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Identifying candidate genes and patterns of heat-stress response in rice using a genome-wide association study and transcriptome analyses

作者：

Yingxue Yang;Chao Zhang;De Zhu;Huiying He;Zhaoran Wei;Qiaoling Yuan;Xiaoxia Li;Xu Gao;Bin Zhang;Hongsheng Gao;Bo Wang;Shuaimin Cao;Tianyi Wang;Yuhua Li;Xiaoman Yu;Longbiao Guo;Guanjing Hu;Qian Qian;Lianguang Shan

单位：

College of Agriculture, Ludong University, Yantai 264025, Shandong, China; Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, Guangdong, China;China National Rice Research Institute (CNRRI), Chinese Academy of Agricultural Sciences, Hangzhou 311401, Zhejiang, China;Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, Guangdong, China;Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, Guangdong, Chin

关键词：

Heat stress;Rice;GWAS;Alternative splicing;Gene pyramiding;HIGH-TEMPERATURE STRESS;SPIKELET FERTILITY;IDENTIFICATION;THERMOTOLERANCE;COMPLEXITY;EXPRESSION;ADAPTATION;LANDSCAPE;STRINGTI

摘要：

Because high temperatures impair rice production, it is desirable to elucidate the regulatory mechanisms involved in rice response to heat stress. The objectives of this study were to identify candidate genes and characterize their response patterns during rice adaptation to high temperatures at the seedling stage. Ten heat-associated quantitative-trait loci were identified in a genome-wide association study. Comparison of transcript abundances in heat-sensitive and heat-tolerant rice pools under heat stress revealed approximately 400 differentially expressed genes. The expression of genes from heat -sensitive accessions changed more than those from heat-tolerant accessions under heat stress. Alternative splicing (AS) events responded to heat stress in rice. The types of AS variants significant dif-ferent between the heat-sensitive and heat-tolerant accessions. Expression patterns differing between the heat-sensitive and heat-tolerant accessions were identified for genes known to be involved in heat stress. We identified eleven genes associated with rice heat stress response. These genes could be pyra-mided to breed heat-tolerant rice accessions. (c) 2022 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC -ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Identifying candidate genes and patterns of heat-stress response in rice using a genome-wide association study and transcriptome analyses

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